Li Jiang-Yan
J Nanosci Nanotechnol. 2017 Feb;17(2):1443-446. doi: 10.1166/jnn.2017.12713.
Simulated transmission spectrums of the sphere dimer nanoparticle and the nanoshell structure by the Finite-Difference time-Domain method are present. The considered structure is silver or SiO₂ dimer nanoparticle and nanoshell structures, and the particle distance is 10 nm. There is little transmission dip in the transmission spectrums for the silver dimer nanoparticle and nanoshell structure in the visible wavelength range, which arisen from the excitation of the Localized Surface Plasmon Resonance. The transmission dip sensitivity with the index refractive for the silver dimer nanoparticle is about 80 nm RIU–1. Meanwhile, the electric field enhancement and localization properties of the Silver dimer nanoparticle is better than that of the SiO₂ dimer nanoparticle. Meanwhile, these structures can extensively apply to biochemical sensor devices design and localized field enhancement device so on.
通过时域有限差分法给出了球形二聚体纳米颗粒和纳米壳结构的模拟透射光谱。所考虑的结构为银或二氧化硅二聚体纳米颗粒和纳米壳结构，颗粒间距为10nm。在可见波长范围内，银二聚体纳米颗粒和纳米壳结构的透射光谱中几乎没有透射凹陷，这是由局域表面等离子体共振激发引起的。银二聚体纳米颗粒的透射凹陷对折射率的灵敏度约为80nm/RIU–1。同时，银二聚体纳米颗粒的电场增强和局域特性优于二氧化硅二聚体纳米颗粒。此外，这些结构可广泛应用于生化传感器器件设计和局域场增强器件等。
